“…In most of this literature, however, the dependent variables related to human behaviour, in particular the speed as controlled by the driver. In this literature, the speed controlled is implicitly assumed to be directly related to the speed perceived [2,6,7,[9][10][11][12][13][14][15][16][17]19,21,23]. Control of speed, however, concerns a complex process, not only affected by perception, but by other higher order cognitive factors in addition, such as the avoidance of risks.…”